I run 20/80 in my Lemo 2s when they are coiled subohm-- they usually are-- and wick rayon. I honestly don't have a problem. I've been wondering why, too; I have been told many times I'd have to mod the tank to open the juice channel. So, I was ready for it-- my middle name is Dremel Tool-- but it hasn't happened. Go figure, right?
80/20 is verging on max vg territory, but it's all about preference. My Kayfun is wonderful right now with a 90/10 Madrina clone.